What do these OBD 2 code mean, P0705 and P0403?

P0403....Exhaust Gas Recirculation Control Circuit


P0705....Transmission Range Sensor Circuit Malfunction (PRNDL Input)





Would this cost alot to get fixed? What do they mean...





And I want to know if my having trouble starting up my car at the gas pump has anything to do with these two. And its only at the pump after putting gas in it... I usually have to rev up the engine to keep it going then drive off. THEN ITS FINE, no issues after that.|||Exhaust gas recirculation is known as EGR and it recycles some of the exhaust gases back into the intake to be mixed in with the air/fuel mixture to be re-burnt which lowers emissions. They are electronic valves that are opened by the ECM/ECU by either an electromagnet solenoid or by a vacuum control valve. The most likely cause is just carbon built up inside the EGR passage. Occasionally, a piece of this carbon can break off and get lodged under the valve, holding it open causing a lean condition. If you get gas at a location just off a highway, I would say, yes, the EGR is most likely the problem. The reason for this diagnoses is because the EGR only operates at highway speeds and as you slow down to pull in for gas, you really don't notice a problem because the vehicle is decelerating. You shot off the vehicle, pump gas, and go to restart it, but this chunk of carbon is causing the engine to lean misfire. When you rev the engine it can sometimes vibrate the chunk loose and the valve closes.


As for the trans. range sensor malfunction it could be the cold weather or a shift indicator sensor is bad. This is the vehicle shift indicator which tells you if the vehicle is in Park, Reverse, Neutral, Drive, or Low. Check to make sure the shift indicator light is working. If I remember right, a burnt indicator bulb could cause that code to be set.


Hope this helps and good luck. Christopher